but of all those jumpers only 10 have lived. only four can walk. kevin hines is one of those four. on september 25, 2000, kevin walked on to the bridge. mentally ill, hearing mysterious voices and in the grip of an unshakable depression he had a compulsion to end his life he was 18 years old. >> when i got here, i was crying my eyes out. and i just kept telling myself you must die, you must die. and a voice in my head kept saying the exact same thing and i said i don't want to do this. don't do this. walk away. if you do this it's over. you're 18, you're dead. about five people to my right, seven people to my left. i turned around looked at the traffic. turned back to the bay and hurdled over the bridge. >> twinkle, twinkle little star. >> reporter: kevin's life has been very lucky in some ways, very unlucky in others. born to mentally ill parents he went to a foster home.